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New Technology of Drying Shrimp Feed
Carousel Drying Technology
Extrusion Technology
VCCR Drying Technology
Manufacturing process for shrimp feed
High Moisture Shrimp Feed Pelleting Process
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Home Innovation New Technology of Drying Shrimp Feed
New Technology of Drying Shrimp Feed
New Way of Drying Shrimp Feed
 
In a modern shrimp feed pelleting process, more liquids
are added into the mash feed. This, in combination
with long term steam conditioning, is increasing
gelatinization and water stability for a better endproduct
quality. Recipe cost optimization can be limited
if there are drying capacity restrictions. In a lot of
situations, moisture removal with only cooling is
not enough and an extra drying step is required.
Moisture control becomes more and more crucial
for quality and cost price reasons.
In traditional shrimp feed processing, there are
separate machines for drying and cooling. The products
are dropped from the pellet mill/post-conditioner
into the dryer for moisture removal, then into the cooler
to cool down the product with ambient air. Moisture
control is done by checking product after the dryer and
corrections are made according to finished product
moistures.

The process is as shown in Figure 1.

 
Integrating drying and cooler in one solution
 
New to the market is the carousel dryer and cooler
combination, a unique solution for both energy
efficiency and precise moisture control.
Optimizing moisture control is a lot easier if the
retention time is short and the dryer and cooler
applies a first in, first out (FIFO) principle. Plus the
moisture can be controlled directly after the cooler
so the impact of more or less water evaporation in the
cooler is already taken care of in the total moisture
control cycle. Therefore, an integration of the dryer
and cooler into one compact machine with a FIFO
discharge principle like the carousel dryer will give
an outstanding control performance (Fig. 2).

The carousel working principle

The complete unit consists of an upper drying zone and
a lower cooling zone. The product comes in through a
rotary valve and then around in the dryer. After nearly
one revolution, the product is gently discharged and
mixed into the next lower tray. This process is repeated

Ambient air cools the product and after filtered and
heated it is used as drying air for the upper section.
Due to the multiple tumbling and optimal air use in the
round dryer, the drying process is extremely efficient
resulting in a low exhaust air temperature. This carousel
dryer – cooler combination model has some beneficial
features when compared to the traditional equipment.

Improving product moisture control

Managing the temperature and moisture content
of the finished product is the main task for the drying
and cooling process. However, when the feed is
overdried, it causes material loss as well as extra
energy consumption. When the feed is too wet, the
product will have a higher risk of quality degradation
and mold growth.
A carousel dryer is working according to the first
in first out (FIFO) principle. Having the product
circling around in a steady and controlled airflow,
all the products will get the same heat treatment
and retention time. Combine this with a unique and
easy control system and its real-time monitoring
and modification of the drying parameters such as
drying air temperature air volume and retention time.
Because the carousel dryer is giving a uniform and
constant moisture level, the target average moisture
can save energy and raw materials (Fig. 4).



Improving energy efficiency

The drying and cooling process
accounts for a significant
part of the overall energy
consumption. Rising energy costs
and sustainability awareness
regarding energy consumption
have driven feed manufacturers
to request further support to
improve their drying and cooling
functions. To maximize energy
efficiency, we have to look into:
• Maximizing the use of warm
product energy.
• Minimizing the amount
of water evaporation.
• Minimizing energy loss
with the exhaust air.
By using the cooling air as
makeup air into the dryer, product energy can be
reused and the amount of exhaust air is limited.
Due to the high drying efficiency, the exhaust air
temperature also reduces the loss of energy by the
already low exhaust air volume. Low exhaust air
volumes will also reduce the cost of odor treatment
if required.

Reducing the space required  

While upgrading the production capacity of a feed 
mill or improving the production process, the
introduction of new equipment into the facility is
required and space limitations may arise.
The carousel dryer is already more compact than a
normal used dryer. The dryer - cooler combined design
has even more space requirement advantages (Fig. 5).
In the limited available space, the cooler was positioned
high in the building. The carousel dryer-cooler
positioned under the post-conditioner avoids the
hot product transport and a lot of air ducting.
 
 
 
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